Author Topic: Rudy's Radial 5 at Half Scale  (Read 60866 times)

Offline b.lindsey

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Re: Rudy's Radial 5 at Half Scale
« Reply #285 on: June 29, 2014, 11:53:36 PM »
Thanks muchly Don!!  Yes I will take some pictures of the test stand and go one better, post the plans for it in the plans section. What I like about it is the large dial which only goes from 0-15 psi...a perfect range for our type engines. It also has a drawer for some tool storage. I'll do that later tonight.

Bill

Offline b.lindsey

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Re: Rudy's Radial 5 at Half Scale
« Reply #286 on: June 30, 2014, 02:19:55 AM »
Kim and Dave Reeves...this post if for you guys.  Rudy calls for a spring between the back of the engine mounting plate and the thumbwheel. I made one...actually several and it  does work but I didn't like how it looked. The only purpose of the spring is to keep the valve pulled rearward so that it doesn't tangle with the con rod bearing. I modified this and instead used a small brass bushing which just fits over the threaded end of the valve and takes up the space the spring normally would. I adjusted the thumb screw so there was maybe .005" of end play...enough to let the bushing float but not enough to let the valve move forward enough to interfere. Just an idea to consider.  Picture below. Overall I think it looks a lot neater.

Bill

Offline Dreeves

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Re: Rudy's Radial 5 at Half Scale
« Reply #287 on: June 30, 2014, 02:49:29 AM »
Bill, I omitted this on my engines. I found that I was able to make the pin just right is the end play was ok without it. What a great runner. I will get mine complete soon.  Thanks for the kick in the pants to get it done

Offline b.lindsey

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Re: Rudy's Radial 5 at Half Scale
« Reply #288 on: June 30, 2014, 03:07:00 AM »
I will look forward to it Dave. Man..the full size version looks like a monster next to your half scale!!

Bill

Offline Johnmcc69

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Re: Rudy's Radial 5 at Half Scale
« Reply #289 on: June 30, 2014, 03:51:00 AM »
 :cartwheel: Awesome Bill!!! A great little runner! A fantastic job on the write up & pic's of the build.

 Congratulations on a superb build!

 John

Offline Kim

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Re: Rudy's Radial 5 at Half Scale
« Reply #290 on: June 30, 2014, 07:24:39 AM »
Congratulations Bill!  She runs like a champ!  :ThumbsUp: :ThumbsUp:

And thanks for the advise on the valve spring.  I may give that a try.  I was thinking if it was just a really weak spring it might be OK, but I agree, the spring looks kinda funny.

Awesome job Bill!
Kim

Offline vcutajar

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Re: Rudy's Radial 5 at Half Scale
« Reply #291 on: June 30, 2014, 08:18:59 AM »
Thanks for the video.  That is really a cute little engine.  I like.

Vince

Offline Roger B

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Re: Rudy's Radial 5 at Half Scale
« Reply #292 on: June 30, 2014, 11:06:45 AM »
Looks and sounds great  :praise2:  :praise2: You just need the CO2 cylinder from a fizzy drinks machine and that will be airborne  ;)
Best regards

Roger

Offline b.lindsey

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Re: Rudy's Radial 5 at Half Scale
« Reply #293 on: June 30, 2014, 12:24:14 PM »
Interesting idea Roger. I have never worked with the CO2 cylinders but know of them of course. Can they be regulated? Wondering how long this engine would run on one too. Could be a handy addition for those times you don't want to set up the compressor but would still like to demonstrate the engine running.

Bill

Offline Roger B

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Re: Rudy's Radial 5 at Half Scale
« Reply #294 on: June 30, 2014, 02:37:09 PM »
There is quite a history to CO2 powered flying models. Hopefully this link works:

http://www.gasparin.cz/page.php?page=co2/motors/history&lng=en

Best regards

Roger

Offline Dreeves

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Re: Rudy's Radial 5 at Half Scale
« Reply #295 on: October 29, 2014, 12:56:56 AM »
Bill, I got the itch to complete my multi year build of the mini Radial 5. You have shamed me to get it done with your speed build of yours  :ROFL:  Here is a picture of the transfer tubes.  I need 5 rods and 5 Pistons.

Dave


Offline b.lindsey

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Re: Rudy's Radial 5 at Half Scale
« Reply #296 on: October 29, 2014, 01:05:25 AM »
That's great news Dave, if its just the rods and pistons you have left then it won't be long until mine has a friend...maybe they can meet up at CF 2015 :)  And BTW, you were the inspiration for me even doing it in the first place so I owe you for that!!

Bill

 

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